how to detect double compressed JPEG images using DCT coefficients?

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Ajay Ganti
Ajay Ganti el 28 de Feb. de 2018
Comentada: Ajay Ganti el 28 de Feb. de 2018
I have a problem related to jpeg compression. How to detect double compressed images using DCT coefficients? Also it is said to plot the histograms for DCT coefficients at frequencies (1,1), (1,2), (2,1) and (2,2) positions. Please help me to do it

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